From: hubermanlab
The concept of the distinct functions of the right and left hemispheres of the brain has evolved significantly over the years. In a recent discussion with Dr. Allan Shore on the Huberman Lab podcast, this topic was explored in depth, shedding light on the intricate roles these brain regions play throughout human development and in forming relationships.
Lateralization at Birth
Dr. Shore explains that lateralization — the specialization of functions between the left and right hemispheres — begins even before birth. It was discovered during the 1980s and 1990s that the human brain undergoes a growth spurt from the last trimester of pregnancy through to the third year of life. During this period, the right hemisphere is dominant [00:08:00].
Right Hemisphere Dominance
The right hemisphere plays a pivotal role in early development, being the primary mediator of non-verbal and emotional communication between the caregiver and the infant. This hemisphere is especially crucial in developing attachment through face, voice, and gesture recognition [00:12:00]. It processes information at levels beneath our conscious awareness and is always active, particularly in emotional interactions [00:06:49].
Functions of the Right Brain
- Emotion and Non-verbal Communication: The right brain is responsible for interpreting and regulating emotions through facial cues, vocal tones, and body language [00:12:18].
- Unconscious Processing: According to Dr. Shore, the right hemisphere is considered the seat of the unconscious mind, primarily responsible for our emotional lives exploring_the_unconscious_mind_and_its_impact [00:06:12].
- Creative Endeavors: Artistic activities, such as music and painting, heavily engage the right hemisphere. It is also involved in empathy, imagination, and creative thinking [01:43:40].
Functions of the Left Brain
- Logical Thought and Language: The left hemisphere is typically associated with language processing neurobiology_of_speech_and_language, logical reasoning, and handling explicit information. It is responsible for verbal communication and the rational analysis of information [00:20:00].
- Narrow Attention: The left hemisphere specializes in narrowly focused attention, tracking linear and sequential processes. This contrasts with the right brain’s capacity for wide-ranging attention [01:17:00].
Dynamic Interaction and Neuroplasticity
The interaction between these hemispheres is not static. Initially, development is dominated by the right hemisphere, then shifts towards the left at the end of the second year, and continues to ebb and flow across different life stages [00:10:37]. This inherent flexibility and neuroplasticity allow adjustments and adaptations in response to environmental and emotional needs throughout life.
Therapeutic Implications
Understanding the balance between right and left brain functions allows for more effective therapeutic practices. A key component of therapy is fostering a right brain to right brain connection between therapist and patient, emphasizing emotional regulation and interactive synchronization [00:31:01].
Emotional Balance
According to Dr. Shore, one’s sense of well-being hinges on the ability to integrate both positive and negative emotions. The processes involved facilitate adaptive interactions within personal relationships and are essential for psychological health [01:02:10].
In conclusion, the intricate functions of the right and left brain influence not only our early development but continue to shape our relational and emotional experiences throughout life. Understanding these dynamics can pave the way for enhanced personal well-being and improved therapeutic outcomes.